An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

4englishapp.com app-ads.txt check

4englishapp.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 3 ad networks expect (100% of 393 lines).

Checked 19 Oct 2026. 412 lines, 406 unique records, 0 duplicates, 0 invalid lines, 23 ad networks detected.

Ad networks in 4englishapp.com/app-ads.txt

Google AdMob — account pub-8211181686902268: 1 line in the file
TikTok Ad Network (Pangle) — account 5040515: 1 line in the file
Liftoff Monetize (Vungle) — account 6a3b4196f28c146c135a6552: 391 lines in the file
AppLovin — partner (reseller) lines only: 13 lines in the file, 22 expected lines missing
Mintegral — partner (reseller) lines only: 160 lines in the file, 400 expected lines missing
Unity Ads — partner (reseller) lines only: 26 lines in the file, 134 expected lines missing
ironSource / LevelPlay — partner (reseller) lines only: 27 lines in the file, 98 expected lines missing
Chartboost — partner (reseller) lines only: 146 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 41 lines in the file, 230 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 117 lines in the file, 333 expected lines missing
Yandex Ads — partner (reseller) lines only: 42 lines in the file, 126 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 33 lines in the file, 111 expected lines missing
BIGO Ads — partner (reseller) lines only: 99 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 362 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 54 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 38 lines in the file, 400 expected lines missing
Monetrix — partner (reseller) lines only: 11 lines in the file, 82 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 123 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 26 lines in the file, 343 expected lines missing
Start.io — partner (reseller) lines only: 13 lines in the file, 144 expected lines missing
CAS.ai — partner (reseller) lines only: 38 lines in the file, 127 expected lines missing
DSail — partner (reseller) lines only: 38 lines in the file, 127 expected lines missing
Bidmachine — partner (reseller) lines only: 191 lines in the file, 400 expected lines missing

Corrected file: 4englishapp.com app-ads.txt (fixed).

FAQ

Does 4englishapp.com have an app-ads.txt?

Yes — https://4englishapp.com/app-ads.txt has 412 lines (checked 19 Oct 2026).

Which ad networks does 4englishapp.com work with?

Its app-ads.txt lists Google AdMob, TikTok Ad Network (Pangle), Liftoff Monetize (Vungle), AppLovin, Mintegral, Unity Ads, ironSource / LevelPlay, Chartboost, InMobi, DT Exchange (Fyber), Yandex Ads, VK Ads (myTarget) and 11 more.

Is the app-ads.txt of 4englishapp.com correct?